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e315f81ba0
fixes `AiksTests.CanRenderBackdropBlurHugeSigma/Metal` I also tweaked the existing quadratic equation to make sure the minima is at 500 and `f(0) = 1`. ## before <img width="1024" alt="Screenshot 2023-12-07 at 4 36 40 PM" src="https://github.com/flutter/engine/assets/30870216/2f32388d-6960-47b2-a690-5e5be2cd4a9a"> ## after <img width="1022" alt="Screenshot 2023-12-07 at 4 32 11 PM" src="https://github.com/flutter/engine/assets/30870216/b1855400-656d-41eb-858c-56fb7a1ab4cf"> ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I added new tests to check the change I am making or feature I am adding, or the PR is [test-exempt]. See [testing the engine] for instructions on writing and running engine tests. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I signed the [CLA]. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/wiki/Tree-hygiene#overview [Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene [test-exempt]: https://github.com/flutter/flutter/wiki/Tree-hygiene#tests [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style [testing the engine]: https://github.com/flutter/flutter/wiki/Testing-the-engine [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/wiki/Chat --------- Co-authored-by: Jonah Williams <jonahwilliams@google.com>